Patents by Inventor Yuanqiao Rao

Yuanqiao Rao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6667148
    Abstract: Thermally developable materials include an imaging layer containing a non-photosensitive source of reducible silver ions. Disposed over the imaging layer is a barrier layer that comprises inorganic filler particles that are intercalated or exfoliated with a hydrophilic or water-dispersible polymer. The particles have a length to thickness ratio of from about 10 to about 1000. The barrier layer can prevent migration of diffusible imaging components and by-products resulting from high temperature imaging and/or development. These thermally developable materials include both thermographic and photothermographic materials.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: December 23, 2003
    Assignee: Eastman Kodak Company
    Inventors: YuanQiao Rao, Jon A. Hammerschmidt, Charles L. Bauer, Robert J. Kress, Anne M. Miller
  • Publication number: 20030152760
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, wherein said foam core sheet has a modulus of between 100 and 2758 MPa and a tensile toughness between 0.344 and 35 MPa, and wherein said upper and lower flange sheet has a modulus of between and 1380 and 20000 MPa and a toughness between 1.4 and 210 MPa.
    Type: Application
    Filed: September 30, 2002
    Publication date: August 14, 2003
    Applicant: Eastman Kodak Company
    Inventors: Yeh-Hung Lai, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Narasimharao Dontula, Gary D. Smith, YuanQiao Rao
  • Publication number: 20030129376
    Abstract: The invention relates to an imaging member comprising an imaging layer and a base wherein said base comprises a closed cell foam core sheet and adhered thereto an upper and lower flange sheet, wherein said foam core sheet has a modulus of between 100 and 2758 MPa and a tensile toughness between 0.344 and 35 MPa, and wherein said upper and lower flange sheet has a modulus of between and 1380 and 20000 MPa and a toughness between 1.4 and 210 MPa.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 10, 2003
    Inventors: Yeh-Hung Lai, Suresh Sunderrajan, Thaddeus S. Gula, William A. Mruk, Narasimharao Dontula, Gary D. Smith, YuanQiao Rao
  • Patent number: 6558884
    Abstract: This invention relates to a poly(ethylene terephthalate)-based photographic film base having improved properties with regard to cutting, perforating, and other finishing or phototofinishing operations. The film base comprises a material in which a specified amount of monomeric units derived from 1,4-cyclohexane dimethanol (CHDM), such that the film base has a specified cutting-related property. The level of CHDM in the PET-based polyester material can be adjusted either by physical blending of polyesters containing CHDM monomeric units or by synthetic incorporation of CHDM monomer units into a PET-based polyester backbone.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: May 6, 2003
    Assignee: Eastman Kodak Company
    Inventors: Jehuda Greener, Yuanqiao Rao, Dennis J. Massa, Yeh-Hung Lai
  • Patent number: 6555303
    Abstract: This invention relates to a poly(ethylene terephthalate)-based photographic film base having improved properties with regard to slitting, perforating, and other finishing or cutting operations. The film base comprises a polyester material in which a specified amount of monomer units derived from 1,4-cyclohexane dimethanol (CHDM), such that the film base has a specified cutting-related property. The level of CHDM can be adjusted in the PET-based polyester material either by physical blending of polyesters containing CHDM monomer units or by synthetic incorporation of CHDM monomer units into a PET-based polyester backbone.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: April 29, 2003
    Assignee: Eastman Kodak Company
    Inventors: Yuanqiao Rao, Jehuda Greener, Yeh-Hung Lai
  • Patent number: 6514660
    Abstract: The invention relates to an imaging member comprising a polymer sheet, a primer layer comprising polyethyleneimine and gelatin contacting said polymer sheet, and an image receiving layer contacting said primer layer.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: February 4, 2003
    Assignee: Eastman Kodak Company
    Inventors: Debasis Majumdar, Peter T. Aylward, Robert P. Bourdelais, YuanQiao Rao